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JOURNAL OF APPLIED PHYSICS
Volume 98, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2108156
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We report an enhancement effect of ultraviolet illumination on the photoluminescence intensities of zinc oxide thin films. Large-grain < 0001 >-textured zinc oxide thin films were deposited on amorphous-fused silica substrates using pulsed laser deposition. We found that the intensities of excitonic emission and green-band emission increased with ultraviolet light exposure time until a maximum value was achieved. We attribute this ultraviolet radiation enhancement effect to oxygen desorption on the surface of the zinc oxide thin film. We have proposed a phenomenological model to explain this interesting photoluminescence behavior. (c) 2005 American Institute of Physics.
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